html {
    box-sizing: border-box;
    background: #ffc600;
    font-family: 'helvetica neue';
    font-size: 20px;
    font-weight: 200;
}

body {
    margin: 0;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

.panels {
    min-height: 100vh;
    display: flex;
    overflow: hidden;
}

.panel {
    background: #6B0F9C;
    box-shadow: inset 0 0 0 5px rgba(255, 255, 255, 0.1);
    color: white;
    text-align: center;
    font-size: 20px;
    background-size: cover;
    background-position: center;
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    transition: font-size 0.7s cubic-bezier(0.61, -0.19, 0.7, -0.11), flex 0.7s cubic-bezier(0.61, -0.19, 0.7, -0.11), background 0.2s;
}

.panel1 {
    background-image: url(images/1.jpeg);
}

.panel2 {
    background-image: url(images/2.jpeg);
}

.panel3 {
    background-image: url(images/3.jpeg);
}

.panel4 {
    background-image: url(images/4.jpeg);
}

.panel5 {
    background-image: url(images/5.jpeg);
}

.panel>* {
    margin: 0;
    width: 100%;
    transition: transform 0.5s 0.7s;
    display: flex;
    flex: 1 0 auto;
    align-items: center;
    justify-content: center;
}

.panel>*:first-child {
    transform: translateY(-100%);
}

.panel>*:last-child {
    transform: translateY(100%);
}

.panel.open>*:first-child {
    transform: translateY(0);
}

.panel.open>*:last-child {
    transform: translateY(0);
}

.panel p {
    text-transform: uppercase;
    font-family: 'Amatic SC', cursive;
    text-shadow: 0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
    font-size: 2em;
}

.panel p:nth-child(2) {
    font-size: 4em;
}

.panel.open {
    flex: 5;
    font-size: 40px;
}